25302513 has 4 divisors (see below), whose sum is σ = 33736688. Its totient is φ = 16868340.

The previous prime is 25302503. The next prime is 25302517. The reversal of 25302513 is 31520352.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 25302513 - 2⁶ = 25302449 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25302513.

It is not an unprimeable number, because it can be changed into a prime (25302517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4217083 + ... + 4217088.

It is an arithmetic number, because the mean of its divisors is an integer number (8434172).

Almost surely, 2^25302513 is an apocalyptic number.

It is an amenable number.

25302513 is a deficient number, since it is larger than the sum of its proper divisors (8434175).

25302513 is an equidigital number, since it uses as much as digits as its factorization.

25302513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8434174.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 25302513 is about 5030.1603354168. The cubic root of 25302513 is about 293.5764529136.

Adding to 25302513 its reverse (31520352), we get a palindrome (56822865).

The spelling of 25302513 in words is "twenty-five million, three hundred two thousand, five hundred thirteen".